class_docstr: Test FASTALoader
code: def test_fasta_one_hot_big(self):
      protein = [
          "A",
          "B",
          "C",
          "D",
          "E",
          "F",
          "G",
          "H",
          "I",
          "J",
          "K",
          "L",
          "M",
          "N",
          "O",
          "P",
          "Q",
          "R",
          "S",
          "T",
          "U",
          "V",
          "W",
          "X",
          "Y",
          "Z",
          "*",
          "-",
      ]
      input_file = os.path.join(
          self.current_dir, "uniprot_truncated.fasta"
      )
      loader = dc.data.FASTALoader(
          OneHotFeaturizer(charset=protein, max_length=1165),
          legacy=False,
      )
      sequences = loader.create_dataset(input_file)
  
      assert sequences.X.shape
  
file_path: deepchem/deepchem/data/tests/test_fasta_loader.py
imports: import os
  import unittest
  import deepchem
  from deepchem.feat.molecule_featurizers import OneHotFeaturizer
label_desc: Use image node_id 4 for calling the TestFASTALoader obj's underlying member method code with example usage: obj.test_fasta_one_hot_big() without return types